Inspect View: Add a view that only does the executor comparison

[smarr]

In addition to "compare" it should be possible to select an "inspect" view from the list of commits.

When only selecting a single commit, or multiple commits from the same list, it should render the executor comparison, possibly with just a single data set.

This would allow to support project setups like for AreWeFastYet, where a different commits are not comparable, but it's useful to inspect the data for a single commit, especially to get the executor comparison.

Maybe we also want to render this view when the same commit is selected in both lists, so, for a self-comparison.